Fuel pump for internal-combustion engines



Oct. 14, 1930. P. L. ORANGE 1,773,158

FUEL PUMP FOR INTERNAL COMBUSTION ENGINES Filed Feb. 12. 1950 INVENTOR.

Patentedv .Oct. 14, 1930 UNITED? STATES PATENT OFFICE- rnosrnn LORANGE, or's'rurrennr, GERMANY FUEL PUMP FOR INTEBNAL GQMBUSTION ENGINES Application filed February 12, 1930, Serial No. 427,932, and in Germany February 6, 1929.

In internal-combustion engines fed with fuel from a pump, the feed is often regulated by a rotary displacement of the pump piston. It is essential that this rotary adjustment should be efifected without applying'lat- .eraL pressure to the piston since the latter,

which has to be carefully ground into its seat, would be subjected by such pressure to adetrimental wear.

The object of the present .invention is to produce a device whereby'the rotary adjustment of a piston of this kind can be effected without subjecting the piston to any lateral pressure, and the invention consists in surrounding the piston by a rotatably supported collar whereby the rotary adjustment of the piston is carried out, the motion being transmitted to the piston through the medium of a slide on the piston longitudinally and in one diametral direction while it is diametrically displaceable relative to the collar in a direction at right angles to that in which it is diametrally displacealole relative to the piston. This arrangement permits a universal diametral displacement of the piston relative to the actuating collar which effectively obviates any lateral pressure on the piston. Fig. 1 of the accompanying drawings represents a longitudinal section of one form of the device,

Fig. 2 is a cross-section of the same, Fig. 3 is a longitudinal sectio'nlof a modified arrangement,

Fig. 4 is a cross-section of the latter, Fig. 5is a longitudinal section of a further modification, and y Fig. 6 is a cross-section of Fig. 5. rThe piston a is rotatably adjusted by means of an integral or divided collar 6 which, in the arrangement shown in Figs. 1 and 2, is rotatably supported in a sleeve d concentric #;-with the piston. ,A controlling member a is mounted on a prismatic portion of the piston ,fso' ajs-to be adjustable on the latter longitudi- '11 in the direction of the arrow y and d1 metrally' in the direction of the arrow 2.

. 1 Tlre' cont'rolling member is provided with di' so-"ametrically opposite lugs 9 whereby it encontrolling member which is arranged to.

gages in recesses in the collar 9 so as to be compelled to participate in the rotation of the latter. The controlling member is diametrally adjustable relative to the collar in thedirection an, i. e., at right angles to the direction. 2.. \Vhile the piston is thus rotatably coupled to the actuating collar it is otherwise quite independent of the same and it will i not, therefore, be, exposed to any lateral engage in notches in the surrounding rim of a the collar. The elements are capable of the same relative movements as previously described.

In the arrangement of Fig'sf5 and 6 the actuating collar 7) is again rotatably supported within the sleeve cl and provided with gear teeth for engagement with an operating rack h. The controlling member 0 has a rectangular shape and fits a rectangular slotpled to the piston a bymeans of a cross-pin 1). Piston and controlling member are axially adjustable relative to the collar 7; and also diametrally' in a direction at right anglesto the pin 4). The controlling member 1s diametrally adjustable relative to the piston 1n the axial direction of the pin 1).

I claim 1. In a fuel pump of the character described for internal-combustion engines, the combination with'. a rotatably adjustable pump piston, of a rotatably supported actuating collar concentric with and embracing said piston, a controlling member arranged to slide on the piston in longitudinal and in one diametral direction, said controlling member being in operative engagement with the collar and capable of diametral displacel in the actuating collar. The member a is coument relative to the latter in a direction "at i right angles to the direction in which it is diametrally displaceable relative to the piston, and means for turning the collar and the piston. V

2. A structure as claimed in claim 1 wherein the controlling member has the form of a disc and is provided with lugs whereby it engages and co-acts with the collar.

3. A structure as claimed in claim 1 wherein the piston has a prismatic portion whereby it inter-engages with the controllingmember.

E'ROSPER LORANGE. 

